| 摘要 |
A gas sensor (210) includes a heater (222) having a connection portion (270) that has a characteristic cross sectional geometry, a heating portion (272) that has a characteristic cross sectional geometry, and a transition portion (274) disposed intermediate the connection (270) and heating portions (272). The transition portion (274) has a cross sectional geometry that is variable along a length thereof to effectuate a smooth transition between the connection portion (270) and the heating portion (272). Typically, the cross sectional geometry of the connection portion (270) is substantially rectangular in shape, while the cross sectional geometry of the heating portion (272) is substantially round. A method of manufacturing the heater (222) having varying cross sectional geometries includes shaping a core material to have a substantially rectangular cross sectional geometry on a first end (228) thereof, shaping the core material to have a substantially round cross sectional geometry on an opposing end (229) thereof, and shaping the core material intermediate the opposing ends (228,229) to effectuate a smooth transition between the portion having the substantially rectangular cross sectional geometry and the portion having the substantially round cross sectional geometry. <IMAGE> |
